The First 48: Season 7, Episode 24

7 - 24: Collateral / Driven to Kill

In Detroit, Sgt. Gary Diaz and Officer Kelly Mullins investigate a triple shooting that left a young mother and her friend dead. The third victim, a critically injured 18-year-old girl, is the only one who can tell them what happened. And in Dallas, a man is intentionally run down and killed by someone in a car.